Pure Herbs Herbal Extracts used historically to support the Nervous System which is the body’s electrochemical communication system. It controls voluntary actions (like walking) and involuntary actions (like breathing). It includes the central nervous system which is mainly the brain and spinal cord, and the peripheral nervous system which are the nerves that connect all other parts of the body to the central nervous system. The Nervous System is the master system of the body. It controls the activity of all other systems. The nervous system is divided into two parts: the Central Nervous System which includes the brain and spinal cord, and the Peripheral Nervous System which is primarily made up of the nerves. The brain controls all body functions; the spinal cord transmits neural signals between the brain and the rest of the body; and the nerves carry signals from the nervous system to the body and from the body to the nervous system. The eye, which is the organ of sight, is also part of the central nervous system.